Enough to go on?

Two short answers today. Both questions come from Lark on December 10, 2012. First: Gail (and anyone else), do you ever spend a lot of time writing something or pursuing an idea then just trashing it? I wrote 20,000 words for my NaNo novel but most of it was junk; I just kept saying to myself, "At least it's words. And at least it counts." However, probably only about 20% of it is acceptable writing, and the other 80% would need LOTS AND LOTS of revisions to even make it make sense. Do you ev...